what is trailing whitespace and how can I handle this?

Question

some piece of my codes:

            if self.tagname and self.tagname2 in list1:
                try: 
                    question = soup.find(\"div\", \"post-te         


        

Answer 1

Trailing whitespace:

It is extra spaces (and tabs) at the end of line      
                                                 ^^^^^ here

Strip them:

#!/usr/bin/env python2
"""\
strip trailing whitespace from file
usage: stripspace.py 
"""

import sys

if len(sys.argv[1:]) != 1:
  sys.exit(__doc__)

content = ''
outsize = 0
inp = outp = sys.argv[1]
with open(inp, 'rb') as infile:
  content = infile.read()
with open(outp, 'wb') as output:
  for line in content.splitlines():
    newline = line.rstrip(" \t")
    outsize += len(newline) + 1
    output.write(newline + '\n')

print("Done. Stripped %s bytes." % (len(content)-outsize))

https://gist.github.com/techtonik/c86f0ea6a86ed3f38893